Prius Antenna Collar

If you have an older Toyota Prius, you might have noticed the rubber collar is cracking or completely falling off and exposing the spring underneath on your antenna mount.  That isn't a problem in itself except that the spring isn't strong enough to keep the antenna still by itself at highway speeds.  The result is the antenna slapping the rear window regularly.  This collar slides over the antenna and down to the base of the antenna where the OEM rubber collar was.  There is an internal chamfer on one end of the collar.  That goes on the bottom toward the roof of the car to help with grip and stability.  After installing this, we'd had no trouble with the antenna slapping the rear window.  It also helps with personalizing the car a bit.  I printed it in PETG with 1mm perimeters (top, bottom, sides).  No supports required.